There is evidence to suggest that ADHD persists in approximately 50-65% of individuals diagnosed with the disorder during childhood. Due to the familial nature and presumed genetic etiology of this disorder, parents with ADHD are more likely to have children also diagnosed with ADHD. Accordingly, higher rates of adult ADHD have been found in parents of children with ADHD. Recent research has determined that among children with ADHD, there is a 23 times greater rate of ADHD in mothers and a 4 times greater rate of ADHD in fathers relative to parents of children without the disorder.